4.9.8. Miscellaneous functionality

The following are command line options that don’t fit any any of the above categories that can be used with configure:

  • --without-memory-manager: Disable building Open MPI’s memory manager. Open MPI’s memory manager is usually built on Linux based platforms, and is generally only used for optimizations with some OpenFabrics-based networks (it is not necessary for OpenFabrics networks, but some performance loss may be observed without it).


    Open MPI’s memory management functionality, which provides important performance optimizations on OS-bypass networks such as InfiniBand, requires the dlsym(3) interface, and therefore does not work with fully-static applications.

  • --with-ft=TYPE: Specify the type of fault tolerance to enable. The only allowed values are ulfm and none. See the ULFM section for more details.

  • --enable-peruse: Enable the PERUSE MPI data analysis interface.

  • --enable-heterogeneous: Enable support for running on heterogeneous clusters (e.g., machines with different endian representations). Heterogeneous support is disabled by default because it imposes a minor performance penalty.


    The heterogeneous functionality is currently broken — do not use.

  • --with-wrapper-cflags=CFLAGS

  • --with-wrapper-cxxflags=CXXFLAGS

  • --with-wrapper-fcflags=FCFLAGS

  • --with-wrapper-ldflags=LDFLAGS

  • --with-wrapper-libs=LIBS: Add the specified flags to the default flags that are used in Open MPI’s “wrapper” compilers (e.g., mpicc — see below for more information about Open MPI’s wrapper compilers). By default, Open MPI’s wrapper compilers use the same compilers used to build Open MPI and specify a minimum set of additional flags that are necessary to compile/link MPI applications. These configure options give system administrators the ability to embed additional flags in OMPI’s wrapper compilers (which is a local policy decision). The meanings of the different flags are:

    • CFLAGS: Flags passed by the mpicc wrapper to the C compiler

    • CXXFLAGS: Flags passed by the mpic++ and mpiCC wrappers to the C++ compiler

    • FCFLAGS: Flags passed by the mpifort wrapper to the Fortran compiler

    • LDFLAGS: Flags passed by all the wrappers to the linker

    • LIBS: Flags passed by all the wrappers to the linker

    See the section on customizing wrapper compiler behavior to see how to alter the wrapper compiler behavior at run time.